#include <iostream>
using std::cout;
using std::endl;
int b = 100;

int & func(){
    return b;
}

void test0(){
    cout << func() << endl;
    cout << &func() << endl;
    cout << b << endl;
    cout << &b << endl;

}


int main(int argc, char * argv[])
{
    test0();
    return 0;
}


